mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
6912fe6f35
After converting a loop to a hardware loop, the pass should remove any unnecessary instructions from the old compare-and-branch code. This patch removes a dead constant assignment that was used in the compare instruction. Differential Revision: http://reviews.llvm.org/D9720 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237373 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
554 B
LLVM
24 lines
554 B
LLVM
; RUN: llc -march=hexagon -mcpu=hexagonv5 -O2 -disable-block-placement=0 < %s | FileCheck %s
|
|
|
|
; Test that there is no redundant register assignment in the hardware loop
|
|
; preheader.
|
|
|
|
; CHECK-NOT: r{{.*}} = #5
|
|
|
|
@g = external global i32
|
|
|
|
define void @foo() #0 {
|
|
entry:
|
|
br i1 undef, label %if.end38, label %for.body
|
|
|
|
for.body:
|
|
%loopIdx.051 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
|
|
store i32 1, i32* @g, align 4
|
|
%inc = add i32 %loopIdx.051, 1
|
|
%cmp9 = icmp ult i32 %inc, 5
|
|
br i1 %cmp9, label %for.body, label %if.end38
|
|
|
|
if.end38:
|
|
ret void
|
|
}
|